ISO 7240-3:2020

INTERNATIONAL ISO
STANDARD 7240-3
Second edition
2020-03
Fire detection and alarm systems —
Part 3:
Audible alarm devices
Systèmes de détection et d'alarme d'incendie —
Partie 3: Dispositifs d'alarme sonores
Reference number
©
ISO 2020
© ISO 2020
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Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 3
4 Requirements . 3
4.1 Compliance . 3
4.2 Sound pressure level . 3
4.3 Frequency and sound pattern . 3
4.4 Audible alarm devices (AADs) with voice . 4
4.5 Synchronization — Optional function . 4
4.6 Construction . 4
4.6.1 Provision for external conductors . 4
4.6.2 Materials . 5
4.6.3 Ingress protection . 5
4.6.4 Access . 5
4.7 On-site adjustment of the mode of operation . 5
4.8 Durability . 5
5 Tests . 6
5.1 General . 6
5.1.1 Atmospheric conditions for tests. 6
5.1.2 Operating conditions for tests . 6
5.1.3 Mounting arrangements . 6
5.1.4 Tolerances . 6
5.1.5 Provision for tests . 7
5.1.6 Test schedule . 7
5.1.7 Test report . 8
5.2 Reproducibility . 8
5.2.1 Object of the test . 8
5.2.2 Test procedure . 8
5.2.3 Requirements . 8
5.3 Operational performance. 9
5.3.1 Object of the test . 9
5.3.2 Test procedure . 9
5.3.3 Requirements . 9
5.4 Durability . 9
5.4.1 Object of the test . 9
5.4.2 Test procedure . 9
5.4.3 Requirements . 9
5.5 Dry heat (operational) . 9
5.5.1 Object of the test . 9
5.5.2 Test procedure and apparatus .10
5.5.3 Requirements .10
5.6 Dry heat (endurance) .10
5.6.1 Object of the test .10
5.6.2 Test procedure .11
5.6.3 Requirements .11
5.7 Cold (operational) .11
5.7.1 Object of the test .11
5.7.2 Test procedure .11
5.7.3 Requirements .12
5.8 Damp heat, cyclic (operational) .12
5.8.1 Object of the test .12
5.8.2 Test procedure .12
5.8.3 Requirements .13
5.9 Damp heat, steady state (endurance) .13
5.9.1 Object of the test .13
5.9.2 Test procedure .13
5.9.3 Requirements .14
5.10 Damp heat, cyclic (endurance) .14
5.10.1 Object of the test .14
5.10.2 Test procedure .14
5.10.3 Requirements .14
5.11 Sulphur dioxide (SO ) corrosion (endurance).14
5.11.1 Object of the test .14
5.11.2 Test procedure .14
5.11.3 Requirements .15
5.12 Shock (operational) .15
5.12.1 Object of the test .15
5.12.2 Test procedure .15
5.12.3 Requirements .
...